Ptashne, Mark

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Title: Ptashne, Mark
Description: Mark Ptashne
Subjects (names): Mark Ptashne
Topics/Categories: Historical -- People
Type: B&W, Photo
Source: General Motors Cancer Research Foundation
Date Created: Unknown
Date Added: January 11, 2010
Reuse Restrictions: None - This image is in the public domain and can be freely reused. Please credit the source and, where possible, the creator listed above.